Error in log when trying to create a kubernetes cluster saying 1 node s had taints that the pod didn t tolerate

Question

I am trying to create a kube cluster and my pods were in the pending state. When I tried looking at the logs, I found something fishy

There was an error saying 

1 node(s) had taints that the pod didn't tolerate.

What does that mean and how do I get rid of it?

Answer 1

You get this error when your pod is not being able to schedule to your worker nodes. This could be coz of various reasons - pods not ready, nodes not ready, not sufficient memory etc. 

I think here your nodes haven't joined the cluster yet, there is no way it is going to deploy a pod on a worker node and hence the error.

You can remove the taint using this command but chose this is your last option as it's not a good practice. What it will do is, it'll start deploying pods on your master instead of your worker nodes which we do not want. 

kubectl taint nodes--all node-role.kubernetes.io/master-

Comments

But that won't work right? Pods cannot be executed on the master right? Theoretically, its impossible right?

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No, even pods can be executed on Master. Its possible

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Yes you can deploy on master but isn't that considered very bad practice?